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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Winnetka, Illinois, with an average temperature ranging between max 28.8°F (-1.8°C) and min 18.9°F (-7.3°C). January stands out as Winnetka's coldest month, with temperatures ranging between an average high of 28.8°F (-1.8°C) and a low of 18.9°F (-7.3°C). Weather in January »
Weather in February
February, the last month of the winter in Winnetka, is also a subzero cold month, with an average temperature ranging between max 31.8°F (-0.1°C) and min 21.6°F (-5.8°C). With the arrival of February, Winnetka's average high-temperature registers at a still subzero cold 31.8°F (-0.1°C), indicating a subtle variation from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Winnetka, is an icy month, with an average temperature ranging between min 31.5°F (-0.3°C) and max 42.3°F (5.7°C). With the arrival of March, the average high-temperature transitions from a subzero cold 31.8°F (-0.1°C) in February to an icy 42.3°F (5.7°C). Weather in March »
Weather in April
April in Winnetka, Illinois, is a fresh spring month, with an average temperature fluctuating between 39.7°F (4.3°C) and 52°F (11.1°C). April's arrival coincides with a temperature rise, moving from March's icy 42.3°F (5.7°C) to a cool 52°F (11.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Winnetka, Illinois, with an average temperature fluctuating between 50.4°F (10.2°C) and 62.8°F (17.1°C). As May begins, there is an increase in the average high-temperature, moving from a cool 52°F (11.1°C) in April to an enjoyable 62.8°F (17.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Winnetka, Illinois, with an average temperature ranging between min 60.1°F (15.6°C) and max 72.5°F (22.5°C). In June, the meteorological conditions change with the average high-temperature moving from a refreshing 62.8°F (17.1°C) in May to an agreeable 72.5°F (22.5°C). Weather in June »
Weather in July
July is a moderately hot summer month in Winnetka, Illinois, with an average temperature fluctuating between 67.1°F (19.5°C) and 79.2°F (26.2°C). With average high and low temperatures of 79.2°F (26.2°C) and 67.1°F (19.5°C) respectively, July is Winnetka's warmest month. Weather in July »
Weather in August
August, the last month of the summer in Winnetka, is another warm month, with an average temperature varying between 66.9°F (19.4°C) and 78.1°F (25.6°C). August's average high-temperature stands at a still moderately hot 78.1°F (25.6°C), showing little deviation from July's 79.2°F (26.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Winnetka, is still a pleasant month, with an average temperature varying between 60.3°F (15.7°C) and 71.6°F (22°C). A mild shift in the average high-temperature occurs in September, reducing from a warm 78.1°F (25.6°C) in August to a pleasant 71.6°F (22°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Winnetka, Illinois, with an average temperature varying between 47.7°F (8.7°C) and 59.5°F (15.3°C). The onset of October results in a decrease in the average high-temperature, receding from an agreeable 71.6°F (22°C) in September to a mild 59.5°F (15.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Winnetka, Illinois, with temperature in the range of an average high of 45.5°F (7.5°C) and an average low of 35.1°F (1.7°C). Onset of November comes with a temperature decline, the average high falling from a refreshing 59.5°F (15.3°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in Winnetka, is also a wintry month, with an average temperature fluctuating between 26.1°F (-3.3°C) and 34.9°F (1.6°C). With the onset of December, Winnetka experiences a modest temperature adjustment, with the average high-temperature receding from a chilly 45.5°F (7.5°C) in November to a cold 34.9°F (1.6°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Winnetka?
January, having an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 18.9°F (-7.3°C), is the coldest month in Winnetka, Illinois.
What is the most humid month in Winnetka?
January is the most humid month in Winnetka, Illinois, with an average relative humidity of 82%.
How much does it rain in Winnetka?
Throughout the year, there are 164.7 rainfall days, and 35.28" (896mm) of precipitation is accumulated.
When does it snow in Winnetka?
Months with snowfall in Winnetka are January through May, October through December.
When does it snow the most in Winnetka?
The month with the most snowfall in Winnetka is January, when snow falls for 13.1 days and typically aggregates up to 4.84" (123mm) of snow.
How many days does it snow in Winnetka?
In Winnetka, Illinois, during the entire year, snow falls for 47.6 days and aggregates up to 17.8" (452mm) of snow.
What is the month with the least sunshine in Winnetka?
The month with the least sunshine in Winnetka, Illinois, is January, with an average of 3.7h of sunshine.
When is Daylight Saving Time (DST) in Winnetka?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Winnetka, Illinois, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the rainiest month in Winnetka?
The wettest months in Winnetka are May and June, with an average 4.57" (116mm) of rainfall.
When it does not snow in Winnetka?
June through September are months without snowfall.
When are the longest days in Winnetka?
June has the longest days of the year, with an average of 15h and 12min of daylight.
What is the month with the highest UV index in Winnetka?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year in Winnetka?
With an average high-temperature of 79.2°F (26.2°C) and an average low-temperature of 67.1°F (19.5°C), July is the warmest month.
What are the months with the most sunshine in Winnetka?
July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Winnetka.
What is the least humid month in Winnetka?
October is the least humid month in Winnetka, Illinois, with an average relative humidity of 73%.
What is the driest month in Winnetka?
December is the month with the least rainfall in Winnetka, Illinois. Rain falls for 9.1 days and accumulates 1.65" (42mm) of precipitation.
What is the month with the shortest days in Winnetka?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
What is the month with the lowest UV index in Winnetka?
The month with the lowest UV index in Winnetka, Illinois, is December, with an average maximum UV index of 1.
Average temperature
Winnetka, IL
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Winnetka, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Winnetka, IL
- Average wind speed in January:
11.5mph - Average wind speed in February:
11.1mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.9mph - Average wind speed in June:
8mph
- Average wind speed in July:
7.3mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.6mph - Average wind speed in October:
10.3mph - Average wind speed in November:
11mph - Average wind speed in December:
10.7mph
The windiest month (with the highest average wind speed) is January (11.5mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity
Winnetka, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Winnetka, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.85" - Average rainfall in March:
2.01" - Average rainfall in April:
3.78" - Average rainfall in May:
4.57" - Average rainfall in June:
4.57"
The wettest months (with the highest rainfall) are May and June (4.57").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days
Winnetka, IL
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.2 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
19.1 days - Average rainfall days in June:
18.2 days
- Average rainfall days in July:
18.4 days - Average rainfall days in August:
17.7 days - Average rainfall days in September:
14.8 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
10.8 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
Winnetka, IL
- Average snowfall in January:
4.84" - Average snowfall in February:
4.65" - Average snowfall in March:
1.22" - Average snowfall in April:
2.44" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Winnetka, IL
- Average snowfall days in January:
13.1 days - Average snowfall days in February:
11.2 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
10 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Winnetka, IL
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Winnetka, IL
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
10.9 days - Average sunshine days in March:
13.3 days - Average sunshine days in April:
10.2 days - Average sunshine days in May:
10 days - Average sunshine days in June:
9.2 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
10.5 days - Average sunshine days in September:
11.7 days - Average sunshine days in October:
13.4 days - Average sunshine days in November:
15.5 days - Average sunshine days in December:
14.3 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (9.2 days).
Average UV index
Winnetka, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Winnetka, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility
Winnetka, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Winnetka, Illinois, USA
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